%0 Journal Article
%T Effect of sediment resuspension frequency on bio-availability of particulate phosphorus in overlying water<br>沉积物悬浮频率对水体颗粒态磷生物有效性的影响
%A LI Dapeng
%A HUANG Yong
%A FAN Chengxin
%A <br>李大鹏
%A 黄勇
%A 范成新
%J 环境科学学报
%D 2011
%I 
%X Lab-scale experiments were conducted to investigate the effect of sediment resuspension under different frequency conditions on bio-availability of particulate phosphorus (PP) in the overlying water. The results show that the bio-availability of PP decreased obviously under sediment resuspension conditions, compared with the initial state. After 30 d, the percentages of algal available phosphorus (AAP) to total phosphorus (Tot-P) in suspended solids were 26.24% (lower frequency) and 20.04% (higher frequency) of the initial state (56.75%), respectively. Sequential fractionation indicated that the proportions of non-occluded Fe/Al-P (AAP) to Fe/Al-P decreased gradually under sediment resuspension conditions with time increasing, although the concentrations of Fe/Al-P increased markedly in suspended solids. This was attributed to dissolved oxygen (DO) penetration and pH values change. Under sediment resuspension conditions, DO concentrations increased from 3 mg·L-1 (initial state) to 6 mg·L-1 (the end). In addition, pH values decreased from 8.02 (initial state) to 7.80 (lower frequency) and 7.60 (higher frequency), respectively. The concentrations of bio-available particulate phosphorus (BAPP) and dissolved total phosphorus (DTP) reduced under sediment resuspension conditions. Correspondingly, the content of bio-available phosphorus (BAP) decreased in the overlying water, compared with the initial state.
%K resuspension
%K bioavailability
%K phosphorus forms
%K particulate phosphorus
%K sediments<br>悬浮
%K 生物有效性
%K 磷形态
%K 颗粒态磷
%K 沉积物
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=03A55E61A8750ACAC6AF81EF9E2AC838&aid=D1920AB56F28E37CE5E7C04B895B0312&yid=9377ED8094509821&vid=4AD960B5AD2D111A&iid=F3090AE9B60B7ED1&sid=52F72B689869171D&eid=BBE4941DB42FA885&journal_id=0253-2468&journal_name=环境科学学报&referenced_num=0&reference_num=22